If a plant has both male and female reproductive organs it is:
a) monoecious.
b) dioecious.

(a) Monoecious

Explanation:

Monoecious refers to plants which have both male and female reproductive organs. Most of the plants have both male and female reproductive organs.

Dioecious describes a plant group that have distinct male and female plants. monoecious is also known as single house as male and female are found in single individual and dioecious is also known as double house as it has distinct male and female plants  

the correct option is option d